Image Texture completely washed out in Render, but not in Viewport Shading
There is object &quot;Plane&quot; in a Collection &quot;FloorPlan&quot; which is hidden in viewport (&quot;closed eye&quot; symbol) but it's still rendered. So it overlaps the floor and causes the glitch in the final render.
In Blender 2.8x, the nasty thing is that objects in a collapsed collection, are still rendered. You need explicitly disabled them (or the collection) for render (&quot;camera&quot; icon). The toggle is not shown by default. You need to activate it in the filter settings of the outliner.

In Blender 2.9x, the checkbox of the collection collapses and inactivates the collection. Then everything inside of the collection is automatically hidden, in viewport and render.